Title :
Bi3Fe5O12 thin film visualizer
Author :
Kahl, S. ; Grishin, A.M. ; Khartsev, S.I. ; Kawano, K. ; Abell, J.S.
Author_Institution :
Dept. of Condensed Matter Phys., R. Inst. of Technol., Stockholm, Sweden
fDate :
7/1/2001 12:00:00 AM
Abstract :
Micrometer thick Bi3Fe5O12 (BIG)(001) films were grown onto Gd3(ScGa)5O12(001) single crystals by the pulsed laser deposition technique. The films are of epitaxial quality with a lattice constant of 1.263 nm. Narrow x-ray rocking curves (full width at half maximum: 0.06 deg) and narrow ferromagnetic resonance lines (widths of 25 Oe) indicate good crystalline quality and magnetic performance. The films possess in-plane magnetization, Faraday rotation as high as -7.8 deg/μm at 630 nm wavelength, and the magnetization M-H curves are linear in the field range from -1.6 kOe to +1.6 kOe. The magneto-optical (MO) properties are almost temperature independent between 5 K and 200 K. This enables the use of thin BIG films as visualizers of magnetic fluxes in high-Tc superconductors. Magnetic fluxes have been visualized in YBa2Cu3O7-x (YBCO) ceramics with an artificial grain boundary. The sensitivity expressed as Faraday rotation angle (per film thickness) per magnetic field unit was found to be 4.9 deg/(kOe.μm) in a 730 nm thick BIG film
Keywords :
Faraday effect; X-ray diffraction; bismuth compounds; ferromagnetic resonance; garnets; magnetic epitaxial layers; magnetic flux; magnetisation; magneto-optical devices; pulsed laser deposition; 5 to 200 K; 630 nm; Bi3Fe5O12; Bi3Fe5O12 epitaxial thin film; Faraday rotation; X-ray diffraction; YBCO ceramic; YBa2Cu3O7; ferromagnetic resonance; grain boundary; high-Tc superconductor; lattice constant; magnetic flux visualizer; magnetization; magneto-optical properties; pulsed laser deposition; Bismuth; Crystallization; Iron; Magnetic films; Magnetic resonance; Magnetization; Pulsed laser deposition; Superconducting films; Superconducting magnets; Visualization;
Journal_Title :
Magnetics, IEEE Transactions on
